Depends on what you meen by bed. I am on assignment with the Red Cross in LA. I have been using an inflatable 3/4 lenght self inflating matress. I think it is a thermorest or something like that. it is in the shelter about a mile away so I can't look, but they are available in any backpacking store.

My accomodations are a room with a concrete floor with a thin rug. Some places I have slept lately have just been concrete. The matress works well, providing reasonable comfort and insulation from the cold floor. It packs small enough for me to carry EDC while on assignment.

Try one before you buy. When I finally get to bed I could probably sleep on broken glass. I am usually exhausted and could sleep anywhere. But I would hate to be without my mat. They do have a limited number of the aluminum/nylon cots, but they are a little short for me and I hear that the heat loss thru the nylon is a problem in a cold room. We are in Louisana and one would think it would be warm, but the facility has air conditioning so the sleeping area is actually quite cold.

nomad